Ok, my concern is that with some future upgrade of wordpress or server modules, metro builder would go out of date and the site won’t function anymore. I manage these websites and I need to make sure they are operational at all times. Would you have any suggestions for a plan of actions.
For example, if I change to your newer theme that incorporates wpbakery, is there a way to migrate the pages I built with metro directly? Or would I have to rebuild the site from scratch?
As the Ronneby and the Dynamic are two absolutely different themes which are based on two totally different page builders. These themes have absolutely different features and options and structure.
So, you will have to rebuild the site on the new theme from scratch.
Can not tell you exactly, as naturally can not test future updates of WP or others.
Please, understand, we are not developers of WordPress or any plugins, so, can not make you sure that their updates won’t hurt the theme functionality.